ML20084U027
| ML20084U027 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 02/09/1977 |
| From: | Fox H TENNESSEE VALLEY AUTHORITY |
| To: | Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| LER-BFRO-50-259-775, NUDOCS 8306270011 | |
| Download: ML20084U027 (2) | |
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glCENSEE EVENT REPORTc -
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[ PLEA 1E PZINT ALL REIUIREJ INFORMATION)
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TYPE E
ua))E LctNSE NuMBEA T
AlLlB] R] Fj 1l l 0 l 0 l-l 0 l 0 l 0 l 0 ] 0 \\-l0 l 0l l4l1 l1l1l1l l0l1l 25 26 30 31 32 IE9 14 15 AEPoAT CATE EVENT CATE hCON'T l l*l d d
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DOCKET NUMBEA CAT EGORY T E 68 69 74 75 80 7 8 57 SB 59 60 61 EVENT DESCRIPTION j
Up l During northal operation, condenser vacuum switches PS-2-1A, PS-2-1B and PS-2-8A we 80 Switches would have performed intended l
89 7*Tj] l found to operate bel'ow Tech. Spec. limit.
c 60 This is a repetitive problem.
Switches were reset and l
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89-g l function if req: tired.
60 35] ] fuTictionally tested satisfactorily. As-found setpoints were 22.4, 22.8 and 22.7 in.He.
uO 60 BFRO-50-259/775 l
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' s] 9l Specified setpoint is 23 in. Hg.
E 80 pave 7 is 9 M
FO VCLATON E
CODE COMPONENT CODE 3 lIlAl (E_)
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'B9 10 11 12 17 43 44 47 48 CAUSE CESCRIP110N l
Q l Pressure switches had drif ted from setpo' int with no evidence of failure or 80
$ l malfunction. Barksdale model'DIT-H18SS Switches reset and functionally tested.
l, 7 89 80 T 89 l
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.9 METHOD CF status
% POWER OTHER STATUS DtSCOVEAY DSCOVERY DESCAiPTON FACLITY Q
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l Surveillance testing l
50 7 8 9
10 12 13 44 45 46 LOCATON OF AELEASE NA l
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AMOUNT OF ACTMTY ASE l AELE SED 0 AE
!2 80 44 45 7.
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10 11 PERSONNEL EXPOSURES NUMBf9 TYPE CESCA;PTON ITElIniniol 1.tj l
NA SO 7 89 11 12 13 PERSONNEL INJURLES l
f;UMBEn DESCAiPION l0 l 0l 0l l
NA 14 80 7 89 11 12 NA l
OFFSITE CONSEQUENCES 33 l eO 770209 00g10S000 R
7 89 LOSS OR DAMAGE TO FACILITY g
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TYPE ot SCA.PTON NA S
h1l 80 7 89 10 PUBUCITY l
NA 80
@l 7 89 ADDITIONAL FACTORS l
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81 60 7 89
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374ol
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7 re FEB Mr.' Norman C. Moseley, Director
/A U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Y
Y Region II 4
g 230 Peachtree Street, NW., Suite 1217 fu Atlanta, Georgia 30303
Dear Mr. Moseley:
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TENNESSEE VALLEY AUTHORITY - BROWNS FERRY NUCLEAR PLANT UNIT 1 -
DOCKET No. 50-259 - FACILITY OPERATING LICENSE DPR REPORTABLE OCCURRENCE REPORT BFRO-50-259/775 The enclosed report is to provide details concerning condenser vacuum switches PS-2-1A, PS-2-1B, and PS-2-8A that were found to operate below technical specification limits during normal operation. This report is submitted in accordance with Browns Ferry Technical Specifications Section 6.
This event occurred on Browns Ferry Nuclear Plant unit 1.
Very truly yours, TENNESSEE VALLEY AUTHORITY H. S. Fox Director of Power Production Enclosure (3)
CC (Enclosure):
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Director (3)
Office of Manag ent Information and Program Control U.S. Nuclear Re,ulatory Commission Washington, D.C.
20555 Director (40)
Office of Inspection and Enforcement t
U.S. Nuclear Regulatory Commission Washington, D.C.
20555 1564 S
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